Leica GPS1200 Series Technical Reference Manual page 870

COGO
Access
a
P5'
P5
P1
P2
P2'
GPS12_157
Refer to "37.2 Accessing COGO" to access COGO Shift, Rotate & Scale.
GPS1200
Scale
a
b
P1 <Rotation Pt:>, can be held fixed, all other
P4'
P2 Known point
P2' Scaled point
P4
P3 Known point
b
P3' Scaled point
P4 Known point
P3
P4' Scaled point
P3'
P5 Known point
P5' Scaled point
Height
Easting
points are then scaled from here
870